body {
    margin: 0px;
    padding: 0px;
    overflow: hidden;
}

.card_1 {
    width: calc(15% + 30px);
    height: calc(100vh - 20px);
    background-color: rgba(0, 0, 0, 0.397);
    border: 1px solid #00FF00;
    padding: 5px;
    display: inline-block;
    position: absolute;
    top: 20px;
}
.card_2 {
    height: 90dvh;
    background-color: rgba(0, 0, 0, 0.678);
    border: 1px solid #00FF00;
    padding: 20px;
    display: inline-block;
    position: absolute;
    width: calc(60%);
    height: calc(100vh - 50px);
}

.card_3 {
    height: calc(100vh - 50px);
    background-color: rgba(0, 0, 0, 0.678);
    border: 1px solid #00FF00;
    padding: 20px;
    display: inline-block;
    position: absolute;
    left: calc(80% + 10px);
    top: 0px;
    width: calc(15% + 30px);
    color: #00FF00;
    overflow-y: scroll;
}


.btn_2 {
    width: 100%;
    height: 40px;
    background-color: rgba(0, 0, 0, 0.555);
    border: none;
    border-left: 5px solid white;
    color: #00FF00;
    margin-top: 10px;
    text-align: left;
    font-weight: bold;
    text-shadow: 0px 0px 10px #00FF00;
    border: 1px solid #00FF00;
    padding-left: 20px;
}

.btn_2:hover {
    background-color: #00FF00;
    color:black;
    box-shadow: 0px 0px 20px #00FF00;
}

